Liquid crystal display element and process for producing the same

Abstract

A liquid crystal display element and a process for producing the same is disclosed. The liquid crystal display is composed of liquid crystals filled in a matrix comprising at least two high polymers having neither mutual compatibility nor substantial compatibility with the liquid crystals, said matrix being sandwiched between two transparent electrode bases. The display element is produced by applying a solution of the liquid crystals and the aforesaid high polymers in a common solvent onto a transparent electrode base, drying the solution to cause phase separation, and laminating another transparent electrode base on the dry film. The display element provides a wide display area with bright contrast and achieves orientation of liquid crystals with a low applied voltage.

What is claimed is: 
     
       1. A process for producing a liquid crystal display element, which comprises dissolving liquid crystals and at least two mutually incompatible high polymers, each polymer being substantially incompatible with the liquid crystals, in a solvent capable of dissolving both the liquid crystals and the high polymers to form a uniform solution,   applying the solution onto a transparent electrode base, followed by drying to form a film, and   laminating another transparent electrode base on the film.   
     
     
       2. A process as claimed in claim 1, wherein said liquid crystals are nematic liquid crystals or smectic liquid crystals. 
     
     
       3. A process as claimed in claim 1, wherein the weight ratio of the liquid crystals to the total high polymers in the solution is in the ranges of from 1:1 to 1:0.25. 
     
     
       4. A process as claimed in claim 1, wherein said solution is applied to a dry thickness of from 2 to 30 μm. 
     
     
       5. A process as claimed in claim 1, wherein said solution is applied to a dry thickness of from 3 to 20 μm.